The cryptographic hash function gets the message and a key as an input, and generates a message digest with a different length in relation to the key length. O a False O b. True The main advantage of the datagram organization is its simplicity, where it allows a host to easily send a packet towards any destination at any time, each packet is forwarded independently by intermediate routers, and packets sent by a host should always follow the same path to reach a given destination O a False Ob. True